Casting process: Lost Foam foundry processing is that the foam disappear when the molten steel is filled and the castings will be done.

Casting crafts:

The molten steel should be poured at the end in order to have a smooth filling which would not have a big cavity for the general Castings.

Pouring channel sectional area should not be too large because the suction and gravity of the vacuum and liquid steel would fill fast.

Foundry processing is different between EPC technology and traditional sand casting:Open mouthed moulding is used in traditional process while close type moulding is used in EPC process.

Note: vacuum suction should be controlled and adjusted while pouring the molten steel in accordance with the castings. And the vacuum  condition must kept for a bit time after pouring .and the castings would be put out when the molten steel is under the condensation  situation